/* roulang page: index */
:root{
  --primary:#4F7CFF;
  --accent:#22E0C6;
  --warn:#F5B85D;
  --bg:#070B14;
  --bg-alt:#0D1322;
  --glass:rgba(14,20,36,.6);
  --border:rgba(255,255,255,.09);
  --text-title:#EAF0FF;
  --text-body:#B4C2E0;
  --text-dim:#7C8DB0;
  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:20px;
  --radius-pill:999px;
  --shadow-card:0 20px 40px rgba(3,7,18,.35);
  --shadow-glow:0 0 24px rgba(34,224,198,.35);
  --nav-height:112px;
  --container-w:1200px;
  --space-section:clamp(60px,8vw,100px);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--text-body);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s ease,border-color .2s ease}
a:hover{color:var(--accent)}
ul,ol{list-style:none}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
.container{max-width:var(--container-w);margin:0 auto;padding:0 24px}
section{position:relative}
::selection{background:rgba(34,224,198,.3);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(7,11,20,.88);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border);
}
.header-top{
  height:64px;display:flex;align-items:center;justify-content:space-between;
  max-width:var(--container-w);margin:0 auto;padding:0 24px;gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-logo{
  width:34px;height:34px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,var(--accent),var(--primary));
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:#fff;
  box-shadow:0 0 14px rgba(34,224,198,.4);
  flex-shrink:0;
}
.brand-name{font-size:18px;font-weight:700;color:var(--text-title);letter-spacing:.02em;white-space:nowrap}
.header-search{display:flex;align-items:center;flex:1;max-width:320px;margin:0 16px}
.header-search input{
  flex:1;height:38px;border-radius:var(--radius-pill) 0 0 var(--radius-pill);
  border:1px solid var(--border);border-right:none;
  background:rgba(255,255,255,.06);padding:0 18px;color:var(--text-title);
  outline:none;transition:border-color .2s,box-shadow .2s;
}
.header-search input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(34,224,198,.15)}
.header-search button{
  height:38px;padding:0 20px;border:none;border-radius:0 var(--radius-pill) var(--radius-pill) 0;
  background:var(--primary);color:#fff;font-weight:500;cursor:pointer;
  transition:background .2s;
}
.header-search button:hover{background:#3d66e8}
.header-cta{flex-shrink:0}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 28px;border-radius:var(--radius-pill);
  background:linear-gradient(135deg,var(--primary),#3B5CE8);
  color:#fff;font-weight:600;border:none;cursor:pointer;
  box-shadow:0 4px 18px rgba(79,124,255,.35);
  transition:box-shadow .2s,transform .2s,opacity .2s;
  white-space:nowrap;
}
.btn-primary:hover{box-shadow:0 6px 28px rgba(79,124,255,.55);transform:translateY(-2px);color:#fff}
.btn-primary:active{transform:translateY(0);box-shadow:0 2px 10px rgba(79,124,255,.3)}
.btn-primary:disabled{opacity:.6;box-shadow:none;transform:none;cursor:not-allowed}
.btn-secondary{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 28px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.05);border:1px solid var(--border);
  color:var(--text-title);font-weight:500;cursor:pointer;
  backdrop-filter:blur(8px);transition:border-color .2s,background .2s,color .2s;
  white-space:nowrap;
}
.btn-secondary:hover{border-color:rgba(34,224,198,.5);color:var(--accent);background:rgba(34,224,198,.06)}
.btn-glow{
  box-shadow:0 0 24px rgba(34,224,198,.35),0 4px 18px rgba(79,124,255,.3);
  background:linear-gradient(135deg,var(--accent),#12b8a0);
  color:#070B14;font-weight:700;
}
.btn-glow:hover{box-shadow:0 0 38px rgba(34,224,198,.5),0 6px 24px rgba(79,124,255,.4);color:#070B14}
.header-nav{
  height:44px;border-top:1px solid rgba(255,255,255,.04);
  max-width:var(--container-w);margin:0 auto;padding:0 24px;
  display:flex;align-items:center;overflow-x:auto;gap:6px;
  scrollbar-width:none;
}
.header-nav::-webkit-scrollbar{display:none}
.nav-pill{
  display:inline-flex;align-items:center;height:30px;padding:0 18px;
  border-radius:var(--radius-pill);font-size:14px;color:var(--text-dim);
  white-space:nowrap;border:1px solid transparent;
  transition:color .2s,border-color .2s,background .2s;
}
.nav-pill:hover{color:var(--text-title);background:rgba(255,255,255,.05)}
.nav-pill.active{
  color:var(--accent);background:rgba(34,224,198,.12);
  border-color:rgba(34,224,198,.3);font-weight:500;
}

/* ===== Hero ===== */
.hero{
  min-height:88vh;display:flex;align-items:center;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  position:relative;overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,20,.55),rgba(7,11,20,.92));
  z-index:1;
}
.hero::after{
  content:'';position:absolute;inset:0;
  background-image:radial-gradient(circle at 25% 40%,rgba(79,124,255,.15),transparent 45%),
  radial-gradient(circle at 75% 70%,rgba(34,224,198,.1),transparent 35%);
  z-index:1;pointer-events:none;
}
.hero-content{position:relative;z-index:2;max-width:var(--container-w);margin:0 auto;padding:0 24px;width:100%}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:24px;
  padding:6px 18px;border-radius:var(--radius-pill);
  background:rgba(34,224,198,.12);border:1px solid rgba(34,224,198,.3);
  color:var(--accent);font-size:14px;font-weight:500;
}
.hero h1{
  font-size:clamp(2rem,5vw,3.5rem);
  color:var(--text-title);line-height:1.25;font-weight:700;
  letter-spacing:.01em;margin-bottom:20px;
  max-width:780px;
}
.hero-sub{
  font-size:clamp(1rem,1.6vw,1.1875rem);
  color:var(--text-body);line-height:1.8;max-width:620px;
  margin-bottom:36px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:48px}
.hero-metrics{
  display:flex;gap:48px;flex-wrap:wrap;align-items:center;
  padding-top:36px;border-top:1px solid rgba(255,255,255,.08);
}
.metric-item .metric-num{
  font-family:Consolas,SF Mono,Menlo,monospace;font-size:2rem;font-weight:700;
  color:var(--text-title);letter-spacing:.02em;
}
.metric-item .metric-num span{color:var(--accent)}
.metric-item .metric-label{font-size:.875rem;color:var(--text-dim);margin-top:4px}
.hero-nodes{
  position:absolute;right:4%;top:50%;transform:translateY(-50%);z-index:2;
  display:flex;flex-direction:column;gap:28px;pointer-events:none;
}
.hero-node{
  width:54px;height:54px;border-radius:14px;position:relative;
  background:rgba(14,20,36,.7);border:1px solid var(--border);
  backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-card);
}
.hero-node::after{
  content:'';position:absolute;bottom:-28px;left:50%;width:1px;height:28px;
  background:linear-gradient(180deg,rgba(34,224,198,.5),transparent);
}
.hero-node:last-child::after{display:none}
.hero-node .dot{
  width:14px;height:14px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 16px rgba(34,224,198,.8);
}
.hero-node .dot.p1{background:var(--primary);box-shadow:0 0 16px rgba(79,124,255,.8)}
.hero-node .dot.p3{background:var(--warn);box-shadow:0 0 16px rgba(245,184,93,.8)}

/* ===== Section common ===== */
.section{padding:var(--space-section) 0;position:relative}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:800px;margin-bottom:48px}
.section-head h2{
  font-size:clamp(1.5rem,3vw,2.25rem);color:var(--text-title);
  line-height:1.35;font-weight:700;margin-bottom:12px;letter-spacing:.01em;
}
.section-head p{color:var(--text-dim);font-size:1rem;line-height:1.7}
.section-head.center{text-align:center;margin-left:auto;margin-right:auto}
.section-head .head-link{
  display:inline-block;margin-top:12px;font-size:.9375rem;
  color:var(--accent);font-weight:500;
}
.section-head .head-link:hover{text-decoration:underline}

/* ===== Steps ===== */
.steps-flow{position:relative;padding:20px 0}
.steps-line{
  position:absolute;top:64px;left:8%;right:8%;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent),#3B5CE8);
  border-radius:4px;opacity:.5;
}
.steps-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:32px;position:relative;
}
.step-item{
  background:var(--glass);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:32px 28px;
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  transition:transform .25s ease-out,border-color .25s,box-shadow .25s;
  position:relative;
}
.step-item:hover{transform:translateY(-6px);border-color:rgba(34,224,198,.4);box-shadow:var(--shadow-card)}
.step-num{
  width:52px;height:52px;border-radius:14px;margin-bottom:20px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(79,124,255,.15);border:1px solid rgba(79,124,255,.3);
  color:var(--primary);font-size:20px;font-weight:700;font-family:Consolas,monospace;
}
.step-item:nth-child(2) .step-num{background:rgba(34,224,198,.12);border-color:rgba(34,224,198,.3);color:var(--accent)}
.step-item:nth-child(3) .step-num{background:rgba(245,184,93,.12);border-color:rgba(245,184,93,.3);color:var(--warn)}
.step-item h3{color:var(--text-title);font-size:1.125rem;margin-bottom:10px;font-weight:600}
.step-item p{font-size:.9375rem;color:var(--text-body);line-height:1.7}

/* ===== Cases ===== */
.cases-metrics{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  margin-bottom:48px;
}
.case-metric{
  background:rgba(255,255,255,.03);border:1px solid var(--border);
  border-radius:var(--radius-md);padding:20px 24px;text-align:center;
}
.case-metric .num{
  font-family:Consolas,monospace;font-size:1.75rem;font-weight:700;color:var(--accent);
}
.case-metric .meta{font-size:.875rem;color:var(--text-dim);margin-top:6px}
.cases-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.case-card{
  background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg);
  overflow:hidden;transition:transform .25s ease-out,border-color .25s,box-shadow .25s;
  display:flex;flex-direction:column;
}
.case-card:hover{transform:translateY(-4px);border-color:rgba(34,224,198,.4);box-shadow:0 0 0 1px rgba(34,224,198,.2),var(--shadow-card)}
.case-card:first-child{transform:translateY(12px)}
.case-card:first-child:hover{transform:translateY(8px)}
.case-cover{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--bg-alt)}
.case-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.case-card:hover .case-cover img{transform:scale(1.04)}
.case-tag{
  position:absolute;top:16px;left:16px;padding:4px 14px;border-radius:var(--radius-pill);
  background:rgba(7,11,20,.8);backdrop-filter:blur(6px);
  color:var(--accent);font-size:.8125rem;border:1px solid rgba(34,224,198,.3);
}
.case-body{padding:24px;flex:1;display:flex;flex-direction:column}
.case-body h3{font-size:1.25rem;color:var(--text-title);font-weight:600;margin-bottom:10px}
.case-body p{font-size:.9375rem;color:var(--text-dim);line-height:1.7;flex:1}
.case-result{
  margin-top:16px;padding-top:16px;border-top:1px solid var(--border);
  display:flex;align-items:center;gap:12px;font-size:.9375rem;color:var(--text-body);
}
.case-result .icon{color:var(--accent);font-weight:700}

/* ===== Capabilities ===== */
.cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.cap-card{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:32px 24px;transition:transform .25s,border-color .25s;
  backdrop-filter:blur(8px);
}
.cap-card:hover{transform:translateY(-4px);border-color:rgba(79,124,255,.4)}
.cap-icon{
  width:48px;height:48px;border-radius:12px;margin-bottom:18px;
  background:rgba(79,124,255,.15);border:1px solid rgba(79,124,255,.25);
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);font-size:22px;
}
.cap-card:nth-child(2) .cap-icon{background:rgba(34,224,198,.1);border-color:rgba(34,224,198,.25);color:var(--accent)}
.cap-card:nth-child(3) .cap-icon{background:rgba(245,184,93,.1);border-color:rgba(245,184,93,.25);color:var(--warn)}
.cap-card:nth-child(4) .cap-icon{background:rgba(79,124,255,.12);border-color:rgba(79,124,255,.25);color:#8CAAFF}
.cap-card h3{color:var(--text-title);font-size:1.0625rem;font-weight:600;margin-bottom:10px}
.cap-card p{font-size:.875rem;color:var(--text-dim);line-height:1.65}

/* ===== Latest list (CMS) ===== */
.latest-wrap{
  background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius-lg);
  overflow:hidden;
}
ul.cms-latest{display:flex;flex-direction:column}
li.cms-item{
  display:flex;gap:24px;padding:24px 28px;align-items:center;
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:background .2s;
}
li.cms-item:last-child{border-bottom:none}
li.cms-item:hover{background:rgba(255,255,255,.03)}
.cms-thumb{
  width:160px;height:100px;border-radius:12px;object-fit:cover;flex-shrink:0;
  border:1px solid var(--border);background:var(--bg);
}
.cms-item-body{flex:1;min-width:0}
.cms-cat{
  display:inline-block;padding:2px 12px;border-radius:var(--radius-pill);
  background:rgba(34,224,198,.1);border:1px solid rgba(34,224,198,.25);
  color:var(--accent);font-size:.8125rem;margin-bottom:8px;
}
.cms-item-body h3{font-size:1.0625rem;color:var(--text-title);font-weight:600;margin-bottom:6px;line-height:1.5}
.cms-item-body h3 a{color:inherit}
.cms-item-body h3 a:hover{color:var(--accent)}
.cms-item-body p{font-size:.875rem;color:var(--text-dim);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cms-item-meta{
  display:flex;align-items:center;gap:16px;margin-top:8px;
  font-size:.8125rem;color:var(--text-dim);
  flex-shrink:0;font-family:Consolas,monospace;
}
.cms-empty{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:160px;border:2px dashed var(--border);border-radius:var(--radius-lg);
  color:var(--text-dim);font-size:.9375rem;padding:32px;text-align:center;
}
.cms-empty .empty-icon{
  width:44px;height:44px;border-radius:50%;border:2px solid var(--border);margin-bottom:12px;
  display:flex;align-items:center;justify-content:center;position:relative;
}
.cms-empty .empty-icon::before{
  content:'';width:18px;height:18px;border-radius:50%;
  border:2px dashed var(--text-dim);position:absolute;
}
.cms-empty .empty-icon::after{
  content:'';width:6px;height:6px;border-radius:50%;background:var(--text-dim);
}

/* ===== FAQ ===== */
.faq-layout{display:grid;grid-template-columns:380px 1fr;gap:48px}
.faq-side{
  position:sticky;top:130px;align-self:start;
  background:var(--glass);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:32px;
  backdrop-filter:blur(8px);
}
.faq-side h3{color:var(--text-title);font-size:1.25rem;margin-bottom:12px}
.faq-side p{font-size:.9375rem;color:var(--text-dim);line-height:1.7;margin-bottom:20px}
.faq-list{border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;background:var(--bg-alt)}
.faq-item{border-bottom:1px solid rgba(255,255,255,.06)}
.faq-item:last-child{border-bottom:none}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:18px 24px;background:transparent;border:none;
  text-align:left;color:var(--text-title);font-size:1rem;font-weight:500;
  cursor:pointer;transition:background .2s,color .2s;min-height:56px;
}
.faq-q:hover{background:rgba(255,255,255,.03);color:var(--accent)}
.faq-q.active{color:var(--accent);border-bottom:1px solid rgba(34,224,198,.2)}
.faq-icon{
  width:20px;height:20px;position:relative;flex-shrink:0;
  transition:transform .3s ease;
}
.faq-icon::before,.faq-icon::after{
  content:'';position:absolute;background:currentColor;border-radius:2px;
  transition:background .3s;
}
.faq-icon::before{width:16px;height:2px;top:9px;left:2px}
.faq-icon::after{width:2px;height:16px;top:2px;left:9px}
.faq-q.active .faq-icon{transform:rotate(45deg)}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .35s ease,padding .3s;
  padding:0 24px;background:rgba(255,255,255,.02);
}
.faq-a-inner{padding:16px 0 20px;color:var(--text-body);font-size:.9375rem;line-height:1.8}
.faq-a-inner p{margin-bottom:8px}
.faq-a-inner p:last-child{margin-bottom:0}

/* ===== CTA form ===== */
.cta-section{
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  position:relative;overflow:hidden;
}
.cta-section::before{
  content:'';position:absolute;inset:0;
  background:rgba(7,11,20,.92);
}
.cta-section::after{
  content:'';position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:40px 40px;
  pointer-events:none;
}
.cta-layout{
  position:relative;z-index:2;display:grid;grid-template-columns:1fr 480px;gap:56px;
  align-items:center;
}
.cta-text h2{font-size:clamp(1.5rem,3vw,2.25rem);color:var(--text-title);margin-bottom:16px}
.cta-text p{color:var(--text-body);font-size:1rem;line-height:1.8;max-width:440px}
.cta-form-card{
  background:rgba(14,20,36,.75);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:36px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}
.cta-form-card h3{color:var(--text-title);font-size:1.25rem;margin-bottom:24px;font-weight:600}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:.875rem;color:var(--text-dim);margin-bottom:8px}
.form-control{
  width:100%;height:44px;border-radius:var(--radius-md);
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.05);
  padding:0 16px;color:var(--text-title);outline:none;
  transition:border-color .2s,box-shadow .2s;
}
.form-control:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(34,224,198,.2)}
textarea.form-control{height:96px;padding:12px 16px;resize:vertical;line-height:1.6}
.form-submit{width:100%;margin-top:8px}
.form-status{
  margin-top:14px;padding:12px 16px;border-radius:var(--radius-md);
  font-size:.875rem;display:none;line-height:1.5;
}
.form-status.success{display:block;background:rgba(34,224,198,.12);border:1px solid rgba(34,224,198,.3);color:var(--accent)}
.form-status.error{display:block;background:rgba(245,93,93,.1);border:1px solid rgba(245,93,93,.3);color:#F55D5D}
.form-note{font-size:.8125rem;color:var(--text-dim);margin-top:12px;text-align:center}

/* ===== Footer ===== */
.site-footer{background:#05080F;border-top:1px solid var(--border);padding:64px 0 0;position:relative}
.footer-top{
  display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:48px;
  padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.06);
}
.footer-brand .brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand p{color:var(--text-dim);font-size:.9375rem;line-height:1.7;max-width:320px}
.footer-cols{display:flex;gap:32px}
.footer-col{flex:1}
.footer-col h4{color:var(--text-title);font-size:.9375rem;font-weight:600;margin-bottom:14px}
.footer-col a{
  display:block;color:var(--text-dim);font-size:.875rem;padding:6px 0;
  transition:color .2s;
}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  padding:20px 0;text-align:center;font-size:.8125rem;color:var(--text-dim);
  border-top:1px solid rgba(255,255,255,.04);
}
.footer-bottom a{color:var(--text-dim);margin:0 6px}
.footer-bottom a:hover{color:var(--accent)}

/* ===== Back to top ===== */
.back-top{
  position:fixed;bottom:32px;right:32px;z-index:999;
  width:44px;height:44px;border-radius:50%;
  background:rgba(14,20,36,.85);border:1px solid rgba(34,224,198,.4);
  color:var(--accent);font-size:18px;cursor:pointer;
  backdrop-filter:blur(8px);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s,transform .3s,visibility .3s;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 0 18px rgba(34,224,198,.2);
}
.back-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:rgba(34,224,198,.15)}


/* ===== Responsive ===== */
@media(max-width:1024px){
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .hero-nodes{display:none}
  .faq-layout{grid-template-columns:1fr;}
  .faq-side{position:static;order:-1}
  .cta-layout{grid-template-columns:1fr;gap:32px}
  .footer-top{grid-template-columns:1fr;gap:32px}
  .footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
}
@media(max-width:768px){
  .header-search{display:none}
  .header-top{height:56px;padding:0 16px}
  .header-nav{height:40px;padding:0 16px}
  .brand-name{font-size:16px}
  .hero{min-height:70vh}
  .hero-content{padding:0 16px}
  .steps-grid{grid-template-columns:1fr;gap:20px}
  .steps-line{display:none}
  .step-item{padding:24px}
  .cases-grid{grid-template-columns:1fr}
  .case-card:first-child{transform:none}
  .case-card:first-child:hover{transform:translateY(-4px)}
  .cases-metrics{grid-template-columns:1fr;gap:12px}
  .cap-grid{grid-template-columns:1fr;gap:16px}
  li.cms-item{flex-direction:column;padding:20px;gap:14px}
  .cms-thumb{width:100%;height:160px}
  .cms-item-meta{flex-wrap:wrap}
  .hero-actions .btn-primary,.hero-actions .btn-secondary{width:100%}
  .cta-form-card{padding:24px}
  .footer-bottom{text-align:left;padding:20px 16px}
  .footer-cols{grid-template-columns:1fr 1fr;gap:16px}
  .back-top{bottom:20px;right:20px}
}
@media(max-width:520px){
  .header-cta .btn-primary{padding:0 18px;height:34px;font-size:.875rem}
  .hero h1{font-size:clamp(1.75rem,7vw,2.4rem)}
  .hero-metrics{gap:24px}
  .metric-item .metric-num{font-size:1.5rem}
  .section-head{margin-bottom:32px}
  .footer-cols{grid-template-columns:1fr}
  .case-body{padding:18px}
  .cap-card{padding:24px}
  .faq-q{padding:16px}
}

/* roulang page: category1 */
:root {
  --primary: #4F7CFF;
  --primary-hover: #6b8fff;
  --accent: #22E0C6;
  --accent-soft: rgba(34, 224, 198, .12);
  --warn: #F5B85D;
  --bg: #070B14;
  --bg-alt: #0D1322;
  --card-bg: rgba(14, 20, 36, .6);
  --title: #EAF0FF;
  --text: #B4C2E0;
  --text-sub: #7C8DB0;
  --border: rgba(255, 255, 255, .09);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --shadow: 0 20px 40px rgba(3, 7, 18, .35);
  --glow: 0 0 24px rgba(34, 224, 198, .35);
  --header-h: 108px;
  --space: clamp(60px, 8vw, 100px);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: Consolas, "SF Mono", "Liberation Mono", monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 130px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body.no-scroll {
  overflow: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease-out, border-color .2s ease-out, background .2s ease-out;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button {
  font-family: var(--font);
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* ===== 双层导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 11, 20, .82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}

.header-top {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  color: #fff;
  letter-spacing: -.02em;
  box-shadow: 0 0 18px rgba(79, 124, 255, .35);
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--title);
  letter-spacing: .02em;
  white-space: nowrap;
}

.header-search {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 360px;
  margin: 0 auto;
}

.header-search input {
  flex: 1;
  height: 38px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .05);
  color: var(--title);
  padding: 0 16px;
  font-size: 14px;
  transition: border-color .2s, box-shadow .2s;
}

.header-search input::placeholder {
  color: var(--text-sub);
}

.header-search input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 224, 198, .18);
}

.header-search button {
  height: 38px;
  padding: 0 18px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, .08);
  color: var(--title);
  font-size: 14px;
  transition: background .2s, color .2s;
  white-space: nowrap;
}

.header-search button:hover {
  background: rgba(79, 124, 255, .25);
  color: #fff;
}

.header-cta {
  flex-shrink: 0;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 22px;
  border-radius: var(--radius-pill);
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background .2s, box-shadow .2s, transform .15s;
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 0 22px rgba(79, 124, 255, .4);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 0 14px rgba(79, 124, 255, .3);
}

.header-nav {
  height: 44px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 24px;
  max-width: 1200px;
  margin: 0 auto;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.header-nav::-webkit-scrollbar {
  display: none;
}

.nav-pill {
  padding: 7px 18px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  color: var(--text-sub);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: all .2s ease-out;
}

.nav-pill:hover {
  color: var(--title);
  background: rgba(255, 255, 255, .05);
}

.nav-pill.active {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: rgba(34, 224, 198, .25);
}

@media (max-width: 768px) {
  .header-top {
    height: 58px;
    padding: 0 16px;
  }

  .header-nav {
    height: 42px;
    padding: 0 16px;
  }

  .header-search {
    max-width: 200px;
  }

  .header-search button {
    padding: 0 12px;
    font-size: 13px;
  }

  .brand-name {
    font-size: 16px;
  }

  .brand-logo {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }

  .header-cta .btn-primary {
    height: 36px;
    padding: 0 16px;
    font-size: 14px;
  }
}

@media (max-width: 520px) {
  .header-search {
    display: none;
  }

  .header-top {
    gap: 8px;
  }

  .header-cta .btn-primary {
    padding: 0 14px;
    font-size: 13px;
  }
}

/* ===== 移动菜单按钮（仅移动端显示） ===== */
.mobile-menu-toggle {
  display: none;
}

@media (max-width: 520px) {
  .mobile-menu-toggle {
    display: inline-flex;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: rgba(255, 255, 255, .06);
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    flex-shrink: 0;
  }

  .mobile-menu-toggle span {
    width: 16px;
    height: 2px;
    background: var(--title);
    border-radius: 2px;
    position: relative;
    display: block;
  }

  .mobile-menu-toggle span::before,
  .mobile-menu-toggle span::after {
    content: '';
    position: absolute;
    left: 0;
    width: 16px;
    height: 2px;
    background: var(--title);
    border-radius: 2px;
    transition: transform .2s;
  }

  .mobile-menu-toggle span::before {
    top: -6px;
  }

  .mobile-menu-toggle span::after {
    top: 6px;
  }

  .mobile-menu-toggle.open span {
    background: transparent;
  }

  .mobile-menu-toggle.open span::before {
    transform: translateY(6px) rotate(45deg);
  }

  .mobile-menu-toggle.open span::after {
    transform: translateY(-6px) rotate(-45deg);
  }
}

/* ===== 分类页 Hero ===== */
.page-hero {
  position: relative;
  min-height: 40vh;
  display: flex;
  align-items: center;
  padding: 64px 0;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(7, 11, 20, .65), rgba(7, 11, 20, .92)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}

.page-hero::after {
  content: '';
  position: absolute;
  right: -20%;
  top: -40%;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(34, 224, 198, .13) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero .container {
  position: relative;
  z-index: 2;
  width: 100%;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-sub);
  transition: color .2s;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb .sep {
  color: rgba(255, 255, 255, .25);
}

.breadcrumb .current {
  color: var(--text);
}

.page-hero h1 {
  font-size: clamp(1.75rem, 4vw, 3rem);
  color: var(--title);
  line-height: 1.25;
  margin-bottom: 16px;
  font-weight: 700;
  letter-spacing: .01em;
}

.page-hero h1 .accent-text {
  color: var(--accent);
}

.page-hero .hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  max-width: 640px;
  margin-bottom: 28px;
}

.page-hero .hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 22px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--border);
  color: var(--title);
  font-size: 15px;
  transition: all .2s ease-out;
  white-space: nowrap;
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--glow);
}

/* ===== 锚点导航 ===== */
.anchor-bar {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 108px;
  z-index: 500;
}

.anchor-bar .container {
  display: flex;
  gap: 8px;
  padding-top: 14px;
  padding-bottom: 14px;
  overflow-x: auto;
  scrollbar-width: none;
}

.anchor-bar .container::-webkit-scrollbar {
  display: none;
}

.anchor-pill {
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid transparent;
  color: var(--text-sub);
  white-space: nowrap;
  transition: all .2s;
}

.anchor-pill:hover {
  color: var(--accent);
  border-color: rgba(34, 224, 198, .3);
  background: var(--accent-soft);
}

@media (max-width: 768px) {
  .anchor-bar {
    top: 100px;
  }
}

@media (max-width: 520px) {
  .anchor-bar {
    top: 92px;
  }
}

/* ===== 通用版块 ===== */
.section {
  padding: var(--space) 0;
}

.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  margin-bottom: 40px;
}

.section-head .eyebrow {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: .08em;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-head .eyebrow::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  color: var(--title);
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-head .section-desc {
  font-size: 16px;
  color: var(--text-sub);
  max-width: 680px;
  line-height: 1.75;
}

@media (max-width: 768px) {
  .section-head {
    margin-bottom: 28px;
  }
}

/* ===== 准备清单 ===== */
.prep-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.prep-item {
  display: flex;
  gap: 18px;
  padding: 26px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  transition: border-color .25s ease-out, transform .25s ease-out, box-shadow .25s ease-out;
}

.prep-item:hover {
  border-color: rgba(34, 224, 198, .35);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.prep-num {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(79, 124, 255, .2), rgba(34, 224, 198, .15));
  border: 1px solid rgba(79, 124, 255, .3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 16px;
  color: var(--accent);
  flex-shrink: 0;
}

.prep-body h3 {
  font-size: 17px;
  color: var(--title);
  margin-bottom: 6px;
  font-weight: 600;
}

.prep-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .prep-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== 阶段流程（纵向时间线） ===== */
.stage-list {
  max-width: 820px;
  margin: 0 auto;
}

.stage-item {
  position: relative;
  padding-left: 44px;
  padding-bottom: 40px;
}

.stage-item:last-child {
  padding-bottom: 0;
}

.stage-item::before {
  content: '';
  position: absolute;
  left: 13px;
  top: 20px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--accent), transparent);
  opacity: .5;
}

.stage-item:last-child::before {
  display: none;
}

.stage-dot {
  position: absolute;
  left: 0;
  top: 4px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-alt);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 4px rgba(34, 224, 198, .08);
}

.stage-dot::after {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.stage-item h3 {
  font-size: 18px;
  color: var(--title);
  margin-bottom: 8px;
  font-weight: 600;
}

.stage-item p {
  font-size: 15px;
  color: var(--text);
  line-height: 1.8;
  max-width: 680px;
}

.stage-tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  color: var(--primary-hover);
  background: rgba(79, 124, 255, .12);
  border: 1px solid rgba(79, 124, 255, .2);
  margin-bottom: 10px;
  font-family: var(--mono);
  letter-spacing: .02em;
}

/* ===== 图文展示 ===== */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 64px;
}

.feature-row:last-child {
  margin-bottom: 0;
}

.feature-row.reverse .feature-img-col {
  order: 2;
}

.feature-img-col {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: var(--bg-alt);
  min-height: 260px;
  display: flex;
}

.feature-img-col img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 260px;
}

.feature-text h3 {
  font-size: 22px;
  color: var(--title);
  margin-bottom: 14px;
  line-height: 1.4;
  font-weight: 700;
}

.feature-text p {
  font-size: 15px;
  color: var(--text);
  margin-bottom: 14px;
  line-height: 1.8;
}

.feature-text ul {
  margin-top: 10px;
}

.feature-text ul li {
  padding-left: 22px;
  position: relative;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--text);
}

.feature-text ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 10px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(34, 224, 198, .5);
}

@media (max-width: 768px) {
  .feature-row,
  .feature-row.reverse {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .feature-row.reverse .feature-img-col {
    order: initial;
  }
}

/* ===== 适用场景 ===== */
.scene-layout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.scene-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: border-color .25s, box-shadow .25s, transform .25s;
}

.scene-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity .25s;
}

.scene-card:hover {
  border-color: rgba(79, 124, 255, .35);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.scene-card:hover::before {
  opacity: 1;
}

.scene-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(79, 124, 255, .18), rgba(34, 224, 198, .1));
  border: 1px solid rgba(79, 124, 255, .25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.scene-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.scene-card h3 {
  font-size: 17px;
  color: var(--title);
  margin-bottom: 8px;
  font-weight: 600;
}

.scene-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.75;
}

@media (max-width: 768px) {
  .scene-layout {
    grid-template-columns: 1fr;
  }
}

/* ===== FAQ ===== */
.faq-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
}

.faq-side {
  position: sticky;
  top: 140px;
  align-self: flex-start;
}

.faq-side h2 {
  font-size: 2rem;
  color: var(--title);
  margin-bottom: 14px;
  font-weight: 700;
}

.faq-side p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 22px;
}

.faq-side .btn-primary {
  height: 42px;
  padding: 0 26px;
}

.faq-list {
  display: block;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  padding: 14px 8px;
  font-size: 15px;
  color: var(--title);
  font-weight: 500;
  text-align: left;
  width: 100%;
  transition: color .2s;
}

.faq-question:hover {
  color: var(--accent);
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all .25s;
  position: relative;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--text-sub);
  border-radius: 2px;
  transition: background .25s, transform .25s;
}

.faq-icon::before {
  width: 10px;
  height: 1.5px;
}

.faq-icon::after {
  width: 1.5px;
  height: 10px;
}

.faq-item.open .faq-icon {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.faq-item.open .faq-icon::before,
.faq-item.open .faq-icon::after {
  background: var(--accent);
}

.faq-item.open .faq-icon::after {
  transform: rotate(90deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease-out;
}

.faq-answer-inner {
  padding: 0 8px 20px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.85;
  max-width: 640px;
}

.faq-item.open .faq-question {
  color: var(--accent);
}

@media (max-width: 900px) {
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .faq-side {
    position: static;
  }
}

/* ===== CTA 表单 ===== */
.cta-section {
  position: relative;
  padding: 90px 0;
  background: linear-gradient(180deg, rgba(7, 11, 20, .88), rgba(13, 19, 34, .96)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-top: 1px solid var(--border);
}

.cta-section::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: .6;
}

.cta-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.cta-left h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--title);
  margin-bottom: 14px;
  line-height: 1.35;
  font-weight: 700;
}

.cta-left p {
  font-size: 15px;
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 22px;
  max-width: 440px;
}

.cta-points {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cta-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text);
}

.cta-points li::before {
  content: '';
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(34, 224, 198, .15);
  border: 1px solid var(--accent);
  box-shadow: 0 0 8px rgba(34, 224, 198, .2);
  flex-shrink: 0;
  position: relative;
}

.cta-points li::after {
  content: '';
  position: absolute;
  margin-left: 0;
}

.cta-points li::marker {
  display: none;
}

.cta-points li span {
  position: relative;
}

.cta-form-panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.cta-form-panel h3 {
  font-size: 18px;
  color: var(--title);
  margin-bottom: 6px;
  font-weight: 600;
}

.cta-form-panel .form-sub {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 22px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, .25);
  color: var(--title);
  font-size: 14px;
  font-family: var(--font);
  transition: border-color .2s, box-shadow .2s;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(124, 141, 176, .6);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 224, 198, .2);
}

.cta-form-panel .btn-primary {
  width: 100%;
  height: 46px;
  font-size: 16px;
  margin-top: 8px;
  background: var(--accent);
  color: #041018;
  font-weight: 700;
  box-shadow: var(--glow);
  border: none;
}

.cta-form-panel .btn-primary:hover {
  background: #37ebd4;
  box-shadow: 0 0 28px rgba(34, 224, 198, .45);
}

.form-status {
  display: none;
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.6;
}

.form-status.success {
  display: block;
  background: rgba(34, 224, 198, .1);
  border: 1px solid rgba(34, 224, 198, .3);
  color: var(--accent);
}

.form-status.error {
  display: block;
  background: rgba(245, 184, 93, .08);
  border: 1px solid rgba(245, 184, 93, .25);
  color: var(--warn);
}

@media (max-width: 900px) {
  .cta-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ===== 返回 CTA 按钮区 ===== */
.back-cta {
  padding: var(--space) 0;
  text-align: center;
}

.back-cta h2 {
  font-size: clamp(1.25rem, 2.4vw, 1.85rem);
  color: var(--title);
  margin-bottom: 10px;
  font-weight: 700;
}

.back-cta p {
  font-size: 15px;
  color: var(--text-sub);
  margin-bottom: 28px;
}

.back-cta .actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #05080f;
  border-top: 1px solid var(--border);
  padding-top: 60px;
}

.site-footer .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.8;
  margin-top: 12px;
  max-width: 380px;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 14px;
  letter-spacing: .02em;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 10px;
  transition: color .2s;
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: rgba(124, 141, 176, .7);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-cols {
    gap: 24px;
  }
}

@media (max-width: 520px) {
  .site-footer .container {
    padding: 0 16px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 6px;
  }
}

/* ===== 减少动效 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category2 */
:root {
  --primary: #4F7CFF;
  --accent: #22E0C6;
  --warning: #F5B85D;
  --bg-deep: #070B14;
  --bg-panel: #0D1322;
  --glass-bg: rgba(14, 20, 36, .6);
  --border-hair: rgba(255, 255, 255, .09);
  --text-heading: #EAF0FF;
  --text-body: #B4C2E0;
  --text-dim: #7C8DB0;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --shadow-card: 0 20px 40px rgba(3, 7, 18, .35);
  --shadow-glow: 0 0 24px rgba(34, 224, 198, .35);
  --transition: all .22s ease-out;
  --content-width: 1200px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-body);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--accent);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: clamp(60px, 8vw, 100px) 0;
}

.section-alt {
  background: var(--bg-panel);
  position: relative;
}

.section-alt::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 224, 198, .3), transparent);
}

.section-head {
  max-width: 760px;
  margin-bottom: 48px;
}

.section-head .eyebrow {
  display: inline-block;
  font-size: .8125rem;
  letter-spacing: .08em;
  color: var(--accent);
  border: 1px solid rgba(34, 224, 198, .25);
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  margin-bottom: 16px;
  background: rgba(34, 224, 198, .06);
}

.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.3;
  letter-spacing: .01em;
}

.section-head p {
  margin-top: 14px;
  font-size: 1rem;
  color: var(--text-dim);
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 20, .88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-hair);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 12px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 18px rgba(34, 224, 198, .35);
  letter-spacing: .02em;
}

.brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: .02em;
}

.header-search {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 420px;
  margin: 0 auto;
  justify-content: center;
}

.header-search input {
  width: 100%;
  height: 40px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, .1);
  background: rgba(255, 255, 255, .06);
  color: var(--text-heading);
  padding: 0 18px;
  font-size: .875rem;
  transition: var(--transition);
}

.header-search input::placeholder {
  color: var(--text-dim);
}

.header-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 224, 198, .2);
  background: rgba(14, 20, 36, .8);
}

.header-search button {
  height: 40px;
  padding: 0 20px;
  border-radius: var(--radius-pill);
  background: var(--primary);
  color: #fff;
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.header-search button:hover {
  background: #3e68e8;
  box-shadow: 0 0 20px rgba(79, 124, 255, .35);
}

.header-cta {
  flex-shrink: 0;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 26px;
  border-radius: var(--radius-pill);
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: .9375rem;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, .12);
}

.btn-primary:hover {
  background: #3e68e8;
  box-shadow: var(--shadow-glow);
  color: #fff;
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 12px rgba(34, 224, 198, .25);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 26px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .14);
  color: var(--text-heading);
  font-weight: 500;
  font-size: .9375rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, .1);
  border-color: rgba(34, 224, 198, .5);
  color: var(--accent);
}

.header-nav {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.header-nav::-webkit-scrollbar {
  display: none;
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  height: 34px;
  padding: 0 18px;
  border-radius: var(--radius-pill);
  font-size: .875rem;
  color: var(--text-dim);
  border: 1px solid transparent;
  transition: var(--transition);
}

.nav-pill:hover {
  color: var(--text-heading);
  background: rgba(255, 255, 255, .05);
}

.nav-pill.active {
  color: var(--accent);
  background: rgba(34, 224, 198, .1);
  border-color: rgba(34, 224, 198, .3);
}

/* ===== Category Hero ===== */
.category-hero {
  position: relative;
  min-height: 40vh;
  display: flex;
  align-items: center;
  padding: 72px 0 56px;
  background: linear-gradient(180deg, rgba(7, 11, 20, .55), rgba(7, 11, 20, .92));
}

.category-hero .bg-img {
  position: absolute;
  inset: 0;
  z-index: -1;
  object-fit: cover;
  width: 100%;
  height: 100%;
}

.category-hero .container {
  position: relative;
  z-index: 2;
}

.breadcrumbs {
  font-size: .8125rem;
  color: var(--text-dim);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-dim);
}

.breadcrumbs a:hover {
  color: var(--accent);
}

.breadcrumbs .sep {
  opacity: .5;
}

.category-hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-heading);
  letter-spacing: .01em;
  margin-bottom: 16px;
}

.category-hero .lead {
  max-width: 620px;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: 28px;
}

.hero-cta-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ===== Anchor Nav ===== */
.anchor-bar {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-hair);
  position: sticky;
  top: 112px;
  z-index: 50;
}

.anchor-bar .container {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-top: 12px;
  padding-bottom: 12px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.anchor-bar .container::-webkit-scrollbar {
  display: none;
}

.anchor-link {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  height: 34px;
  padding: 0 18px;
  border-radius: var(--radius-pill);
  font-size: .875rem;
  color: var(--text-dim);
  border: 1px solid rgba(255, 255, 255, .08);
  background: rgba(255, 255, 255, .04);
  transition: var(--transition);
}

.anchor-link:hover {
  color: var(--accent);
  border-color: rgba(34, 224, 198, .35);
}

/* ===== Split Intro ===== */
.split-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.split-intro .media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.split-intro .media::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, .06);
  border-radius: var(--radius-lg);
  pointer-events: none;
}

.split-intro .media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
}

.split-intro .media .float-tag {
  position: absolute;
  left: 16px;
  bottom: 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: rgba(7, 11, 20, .75);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(34, 224, 198, .35);
  font-size: .8125rem;
  color: var(--text-heading);
}

.split-intro .content h3 {
  font-size: 1.5rem;
  color: var(--text-heading);
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.4;
}

.split-intro .content p {
  margin-bottom: 14px;
  color: var(--text-body);
}

.split-intro .content .check-list {
  list-style: none;
  margin-top: 10px;
}

.split-intro .content .check-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 10px;
  color: var(--text-body);
}

.split-intro .content .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 14px;
  height: 8px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}

/* ===== Modules Grid ===== */
.modules-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.module-card {
  background: var(--glass-bg);
  border: 1px solid var(--border-hair);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.module-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: var(--transition);
}

.module-card:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 224, 198, .35);
  box-shadow: var(--shadow-card);
}

.module-card:hover::before {
  opacity: 1;
}

.module-card .icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(79, 124, 255, .18), rgba(34, 224, 198, .12));
  border: 1px solid rgba(34, 224, 198, .2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.module-card .icon-wrap svg {
  width: 24px;
  height: 24px;
  stroke: var(--accent);
}

.module-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 10px;
}

.module-card p {
  font-size: .9375rem;
  color: var(--text-dim);
  line-height: 1.75;
}

/* ===== Process Timeline ===== */
.process-wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 16px;
}

.process-step {
  position: relative;
  padding: 0 24px;
}

.process-step:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 32px;
  right: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, rgba(34, 224, 198, .4), rgba(34, 224, 198, .08));
}

.process-step .step-num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-heading);
  background: var(--bg-deep);
  border: 1px solid rgba(34, 224, 198, .4);
  box-shadow: 0 0 24px rgba(34, 224, 198, .12);
  margin-bottom: 18px;
  position: relative;
  z-index: 2;
}

.process-step h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.process-step p {
  font-size: .875rem;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ===== Scenarios ===== */
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.scenario-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-hair);
  overflow: hidden;
  background: var(--bg-panel);
  transition: var(--transition);
}

.scenario-card:hover {
  border-color: rgba(34, 224, 198, .3);
  box-shadow: var(--shadow-card);
}

.scenario-card .cover {
  height: 180px;
  overflow: hidden;
  position: relative;
}

.scenario-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .35s ease-out;
}

.scenario-card:hover .cover img {
  transform: scale(1.04);
}

.scenario-card .cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, rgba(7, 11, 20, .6));
}

.scenario-card .body {
  padding: 24px 28px 28px;
}

.scenario-card .tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  font-size: .8125rem;
  color: var(--accent);
  background: rgba(34, 224, 198, .08);
  border: 1px solid rgba(34, 224, 198, .2);
  margin-bottom: 12px;
}

.scenario-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.scenario-card p {
  font-size: .875rem;
  color: var(--text-dim);
  line-height: 1.75;
}

/* ===== Metrics ===== */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.metric-item {
  background: var(--glass-bg);
  border: 1px solid var(--border-hair);
  border-radius: var(--radius-lg);
  padding: 36px 20px;
  transition: var(--transition);
}

.metric-item:hover {
  border-color: rgba(34, 224, 198, .3);
}

.metric-item .value {
  font-family: "SF Mono", Consolas, "Liberation Mono", monospace;
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 8px;
}

.metric-item .label {
  font-size: .875rem;
  color: var(--text-dim);
}

/* ===== FAQ ===== */
.faq-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
  align-items: start;
}

.faq-side {
  position: sticky;
  top: 180px;
}

.faq-side h3 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 14px;
}

.faq-side p {
  font-size: .9375rem;
  color: var(--text-dim);
  line-height: 1.75;
  margin-bottom: 20px;
}

.faq-list {
  border-top: 1px solid var(--border-hair);
}

.faq-item {
  border-bottom: 1px solid var(--border-hair);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  text-align: left;
  padding: 20px 0;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-heading);
  transition: var(--transition);
  background: none;
}

.faq-question:hover {
  color: var(--accent);
}

.faq-question .icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .12);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
  position: relative;
}

.faq-question .icon::before,
.faq-question .icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  border-radius: 2px;
  transition: var(--transition);
}

.faq-question .icon::before {
  width: 10px;
  height: 2px;
}

.faq-question .icon::after {
  width: 2px;
  height: 10px;
}

.faq-item.active .faq-question {
  color: var(--accent);
}

.faq-item.active .faq-question .icon {
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(34, 224, 198, .25);
}

.faq-item.active .faq-question .icon::after {
  transform: scaleY(0);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease-out;
}

.faq-answer-inner {
  padding-bottom: 20px;
  color: var(--text-dim);
  font-size: .9375rem;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  background: var(--bg-deep);
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity: .12;
}

.cta-section::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 11, 20, .88), rgba(13, 19, 34, .96));
}

.cta-wrap {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.cta-copy h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.3;
  margin-bottom: 16px;
}

.cta-copy p {
  font-size: 1rem;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 440px;
}

.cta-form-panel {
  background: var(--glass-bg);
  border: 1px solid var(--border-hair);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 36px;
  box-shadow: var(--shadow-card);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: .875rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, .1);
  background: rgba(7, 11, 20, .6);
  color: var(--text-heading);
  font-size: .9375rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34, 224, 198, .2);
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.form-message {
  margin-top: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: .875rem;
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(34, 224, 198, .08);
  border: 1px solid rgba(34, 224, 198, .3);
  color: var(--accent);
}

.form-message.error {
  display: block;
  background: rgba(245, 184, 93, .08);
  border: 1px solid rgba(245, 184, 93, .3);
  color: var(--warning);
}

/* ===== Footer ===== */
.site-footer {
  background: #050810;
  border-top: 1px solid var(--border-hair);
  padding: 56px 0 28px;
}

.site-footer .footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}

.footer-brand .brand {
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: .875rem;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 360px;
  margin-top: 12px;
}

.footer-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.footer-col h4 {
  font-size: .9375rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  font-size: .875rem;
  color: var(--text-dim);
  padding: 4px 0;
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 24px;
  font-size: .8125rem;
  color: var(--text-dim);
}

.footer-bottom .sep {
  opacity: .4;
}

/* ===== Focus ===== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .header-search {
    max-width: 280px;
  }
  .header-top {
    flex-wrap: wrap;
  }
  .anchor-bar {
    top: 104px;
  }
  .process-wrap {
    grid-template-columns: 1fr 1fr;
    gap: 32px 0;
  }
  .process-step:nth-child(2)::after {
    display: none;
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .header-top {
    flex-wrap: wrap;
    padding: 10px 16px;
  }
  .header-search {
    order: 3;
    flex-basis: 100%;
    max-width: none;
    margin-top: 4px;
  }
  .header-cta .btn-primary {
    height: 38px;
    padding: 0 18px;
    font-size: .875rem;
  }
  .header-nav {
    padding-left: 16px;
    padding-right: 16px;
  }
  .category-hero {
    min-height: auto;
    padding: 56px 0 48px;
  }
  .split-intro {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .modules-grid {
    grid-template-columns: 1fr;
  }
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .metrics-grid {
    grid-template-columns: 1fr 1fr;
  }
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .faq-side {
    position: static;
  }
  .cta-wrap {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .site-footer .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .process-wrap {
    grid-template-columns: 1fr;
  }
  .process-step::after {
    display: none;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 15px;
  }
  .brand-name {
    font-size: 1rem;
  }
  .brand-logo {
    width: 34px;
    height: 34px;
    font-size: .875rem;
  }
  .header-search input {
    font-size: .8125rem;
  }
  .header-search button {
    padding: 0 14px;
    font-size: .8125rem;
  }
  .category-hero h1 {
    font-size: 1.75rem;
  }
  .module-card {
    padding: 24px;
  }
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  .cta-form-panel {
    padding: 24px;
  }
  .footer-bottom {
    flex-wrap: wrap;
    gap: 8px;
  }
  .nav-pill {
    padding: 0 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}

/* roulang page: article */
:root {
  --primary: #4F7CFF;
  --accent: #22E0C6;
  --warn: #F5B85D;
  --bg: #070B14;
  --bg-deep: #05080F;
  --panel: #0D1322;
  --glass: rgba(14, 20, 36, .6);
  --text-title: #EAF0FF;
  --text-body: #B4C2E0;
  --text-muted: #7C8DB0;
  --border: rgba(255, 255, 255, .09);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --shadow-card: 0 20px 40px rgba(3, 7, 18, .35);
  --transition: .22s ease-out;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
button,
input {
  font-family: inherit;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.container-narrow {
  max-width: 780px;
}

/* 双层导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(7, 11, 20, .78);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  transition: box-shadow .22s ease-out;
}
.site-header.scrolled {
  box-shadow: 0 8px 24px rgba(3, 7, 18, .25);
}
.header-top {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, #4F7CFF, #22E0C6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #070B14;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .02em;
  box-shadow: 0 0 18px rgba(34, 224, 198, .3);
}
.brand-name {
  color: var(--text-title);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .02em;
  white-space: nowrap;
}
.header-search {
  flex: 1;
  max-width: 420px;
  margin-left: auto;
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius-pill);
  height: 40px;
  padding: 0 4px 0 16px;
}
.header-search input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-title);
  font-size: 14px;
}
.header-search input::placeholder {
  color: var(--text-muted);
}
.header-search button {
  height: 32px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background var(--transition), box-shadow var(--transition);
}
.header-search button:hover {
  background: #5F89FF;
  box-shadow: 0 0 16px rgba(79, 124, 255, .3);
}
.header-cta {
  flex-shrink: 0;
}
.btn-primary {
  display: inline-block;
  background: linear-gradient(135deg, #4F7CFF, #3B62D6);
  color: #FFFFFF;
  border: none;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(79, 124, 255, .3);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  cursor: pointer;
  text-align: center;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(34, 224, 198, .35);
  background: linear-gradient(135deg, #5F89FF, #4F7CFF);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(79, 124, 255, .2);
}
.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .14);
  color: var(--text-title);
  transition: all var(--transition);
  cursor: pointer;
  text-align: center;
}
.btn-secondary:hover {
  border-color: rgba(34, 224, 198, .45);
  color: var(--accent);
  background: rgba(34, 224, 198, .04);
}
.header-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 8px 24px 10px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.header-nav::-webkit-scrollbar {
  display: none;
}
.nav-pill {
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  color: var(--text-muted);
  font-size: 14px;
  transition: all var(--transition);
  border: 1px solid transparent;
  flex-shrink: 0;
}
.nav-pill:hover {
  color: var(--text-title);
  background: rgba(255, 255, 255, .04);
}
.nav-pill.active {
  color: var(--accent);
  background: rgba(34, 224, 198, .08);
  border-color: rgba(34, 224, 198, .2);
}

/* 文章头部 */
.article-head {
  position: relative;
  padding: 56px 0 48px;
  background:
    linear-gradient(180deg, rgba(7, 11, 20, .88), rgba(7, 11, 20, .96)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  font-size: 14px;
  color: var(--text-muted);
}
.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb-sep {
  color: var(--text-muted);
  opacity: .6;
}
.breadcrumb-current {
  color: var(--text-body);
}
.breadcrumb-here {
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 260px;
}
.article-header h1 {
  font-size: clamp(1.75rem, 3.6vw, 2.6rem);
  line-height: 1.32;
  color: var(--text-title);
  font-weight: 700;
  max-width: 860px;
  margin-bottom: 20px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-size: 14px;
  color: var(--text-muted);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-item::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  display: inline-block;
}

/* 正文区 */
.article-body-section {
  background: var(--bg);
  padding: 56px 0 72px;
}
.article-content {
  color: var(--text-body);
  font-size: 17px;
  line-height: 2;
  word-break: break-word;
}
.article-content p {
  margin-bottom: 1.5em;
}
.article-content h2 {
  font-size: 1.5rem;
  color: var(--text-title);
  margin-top: 2.2em;
  margin-bottom: .8em;
  line-height: 1.3;
  font-weight: 700;
}
.article-content h3 {
  font-size: 1.25rem;
  color: var(--text-title);
  margin-top: 2em;
  margin-bottom: .7em;
  line-height: 1.35;
  font-weight: 600;
}
.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color var(--transition);
}
.article-content a:hover {
  color: var(--primary);
}
.article-content ul,
.article-content ol {
  margin-bottom: 1.5em;
  padding-left: 1.4em;
}
.article-content li {
  margin-bottom: .5em;
}
.article-content blockquote {
  border-left: 3px solid var(--primary);
  background: rgba(79, 124, 255, .06);
  padding: 16px 20px;
  border-radius: 0 12px 12px 0;
  margin-bottom: 1.5em;
  color: #D6E0F5;
}
.article-content pre {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 12px;
  padding: 18px 20px;
  overflow-x: auto;
  font-family: Consolas, "SF Mono", "Liberation Mono", monospace;
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 1.5em;
}
.article-content code {
  font-family: Consolas, "SF Mono", monospace;
  background: rgba(255, 255, 255, .06);
  padding: 2px 6px;
  border-radius: 6px;
  font-size: .9em;
}
.article-content pre code {
  background: transparent;
  padding: 0;
}
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  margin-bottom: 1.5em;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5em;
  font-size: 15px;
}
.article-content th {
  background: rgba(79, 124, 255, .1);
  color: var(--text-title);
  padding: 10px 12px;
  text-align: left;
  border: 1px solid rgba(255, 255, 255, .08);
}
.article-content td {
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, .08);
}
.article-missing {
  text-align: center;
  padding: 48px 24px;
  border: 1px dashed rgba(255, 255, 255, .14);
  border-radius: var(--radius-lg);
  background: rgba(14, 20, 36, .4);
}
.article-missing p {
  font-size: 18px;
  color: var(--text-title);
  margin-bottom: 20px;
}

/* 相关推荐 */
.article-related-section {
  background: var(--panel);
  padding: 64px 0 80px;
  border-top: 1px solid rgba(255, 255, 255, .05);
}
.related-head {
  margin-bottom: 32px;
}
.related-head h2 {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  color: var(--text-title);
  font-weight: 700;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: block;
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.related-card:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 224, 198, .35);
  box-shadow: var(--shadow-card);
}
.related-cover {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.related-info {
  padding: 20px;
}
.related-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(34, 224, 198, .1);
  color: var(--accent);
  font-size: 12px;
  border: 1px solid rgba(34, 224, 198, .2);
}
.related-info h3 {
  font-size: 18px;
  color: var(--text-title);
  margin-top: 12px;
  margin-bottom: 8px;
  line-height: 1.4;
}
.related-info p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

/* CTA */
.article-sub-cta {
  background: var(--bg);
  border-top: 1px solid rgba(255, 255, 255, .04);
  padding: 64px 0 72px;
}
.sub-cta-inner {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(7, 11, 20, .85), rgba(7, 11, 20, .95)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-radius: 24px;
  padding: 48px;
  border: 1px solid rgba(255, 255, 255, .08);
  text-align: center;
}
.sub-cta-inner::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  left: 50%;
  top: -100px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(79, 124, 255, .25), transparent 70%);
  filter: blur(20px);
  pointer-events: none;
}
.sub-cta-inner h2 {
  color: var(--text-title);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  margin-bottom: 12px;
}
.sub-cta-inner p {
  color: var(--text-muted);
  font-size: 16px;
  margin-bottom: 32px;
}
.sub-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* 页脚 */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(255, 255, 255, .05);
  padding: 56px 0 28px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, .05);
}
.footer-brand .brand {
  margin-bottom: 16px;
}
.footer-brand p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  max-width: 360px;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.footer-col h4 {
  color: var(--text-title);
  font-size: 15px;
  margin-bottom: 14px;
  font-weight: 600;
}
.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 14px;
  padding: 4px 0;
  transition: color var(--transition);
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-bottom {
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: #5A6A8A;
  font-size: 13px;
}

/* 回到顶部 */
.back-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 900;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(14, 20, 36, .85);
  border: 1px solid rgba(255, 255, 255, .12);
  color: var(--text-muted);
  text-decoration: none;
  box-shadow: 0 12px 28px rgba(3, 7, 18, .35);
  transition: all var(--transition);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.back-top:hover {
  color: var(--accent);
  border-color: rgba(34, 224, 198, .4);
  transform: translateY(-2px);
}

/* 响应式 */
@media (max-width: 1024px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .header-search {
    max-width: 320px;
  }
}
@media (max-width: 768px) {
  .header-search {
    display: none;
  }
  .header-top {
    padding: 10px 16px;
    gap: 10px;
  }
  .header-nav {
    padding-left: 16px;
    padding-right: 16px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .sub-cta-inner {
    padding: 32px 20px;
  }
  .article-head {
    padding: 32px 0 28px;
  }
  .article-body-section {
    padding: 32px 0 48px;
  }
  .article-related-section {
    padding: 40px 0 56px;
  }
  .article-content {
    font-size: 16px;
  }
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}
@media (max-width: 520px) {
  .brand-name {
    font-size: 16px;
  }
  .header-cta .btn-primary {
    padding: 8px 16px;
    font-size: 13px;
  }
  .sub-cta-actions .btn-primary,
  .sub-cta-actions .btn-secondary {
    width: 100%;
  }
  .related-info h3 {
    font-size: 17px;
  }
  .breadcrumb-here {
    max-width: 180px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category3 */
:root {
  --primary: #4F7CFF;
  --accent: #22E0C6;
  --warning: #F5B85D;
  --bg: #070B14;
  --bg-alt: #0D1322;
  --title: #EAF0FF;
  --text: #B4C2E0;
  --text-dim: #7C8DB0;
  --border: rgba(255, 255, 255, .09);
  --shadow: 0 20px 40px rgba(3, 7, 18, .35);
  --glow: 0 0 24px rgba(34, 224, 198, .35);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: Consolas, "SF Mono", "Liberation Mono", monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease-out, border-color .2s ease-out, background .2s ease-out; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; font-size: 1rem; outline: none; border: 1px solid var(--border); border-radius: var(--radius-md); background: rgba(255, 255, 255, .04); color: var(--title); padding: 12px 16px; transition: border-color .2s ease-out, box-shadow .2s ease-out; }
input::placeholder, textarea::placeholder { color: var(--text-dim); }
input:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(34, 224, 198, .2); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.section { padding: clamp(64px, 8vw, 100px) 0; scroll-margin-top: 120px; }
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), #3A5FE0);
  color: #fff; font-size: .9375rem; font-weight: 600;
  padding: 10px 24px; border-radius: var(--radius-pill);
  border: 1px solid transparent;
  box-shadow: 0 4px 18px rgba(79, 124, 255, .25);
  transition: transform .2s ease-out, box-shadow .2s ease-out, background .2s ease-out;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(79, 124, 255, .38); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 12px rgba(79, 124, 255, .2); }
.btn-ghost {
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, .06);
  color: var(--title); font-size: .9375rem; font-weight: 500;
  padding: 10px 24px; border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
  transition: transform .2s ease-out, border-color .2s ease-out, background .2s ease-out;
}
.btn-ghost:hover { transform: translateY(-2px); border-color: rgba(34, 224, 198, .4); background: rgba(255, 255, 255, .09); }
.btn-ghost:active { transform: translateY(0); }
.btn-glow {
  background: linear-gradient(135deg, #1CC9B0, #22E0C6);
  color: #04211D; font-weight: 700;
  box-shadow: 0 0 24px rgba(34, 224, 198, .35);
}
.btn-glow:hover { box-shadow: 0 0 36px rgba(34, 224, 198, .5); }
.btn-glow:disabled { opacity: .6; box-shadow: none; transform: none; cursor: not-allowed; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(7, 11, 20, .85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-top {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; gap: 16px;
  padding: 10px 24px; height: 64px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-logo {
  width: 34px; height: 34px; border-radius: 9px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  font-size: .8125rem; font-weight: 800; color: #fff; letter-spacing: .02em;
  box-shadow: 0 0 18px rgba(79, 124, 255, .4);
}
.brand-name { font-size: 1.0625rem; font-weight: 700; color: var(--title); letter-spacing: .01em; white-space: nowrap; }
.header-search { flex: 1; display: flex; justify-content: flex-end; max-width: 480px; margin-left: auto; }
.header-search input {
  width: 100%; max-width: 320px; border-radius: var(--radius-pill);
  padding: 8px 18px; font-size: .875rem; background: rgba(255, 255, 255, .05);
}
.header-search button {
  margin-left: -46px; z-index: 1;
  padding: 6px 18px; border-radius: var(--radius-pill);
  background: transparent; color: var(--accent); font-size: .875rem; font-weight: 600;
}
.header-search button:hover { color: var(--title); }
.header-cta { flex-shrink: 0; }
.header-cta .btn-primary { padding: 8px 20px; font-size: .875rem; }
.header-nav {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; gap: 8px;
  padding: 6px 24px; overflow-x: auto; scrollbar-width: none;
  border-top: 1px solid rgba(255, 255, 255, .04);
}
.header-nav::-webkit-scrollbar { display: none; }
.nav-pill {
  display: inline-block; white-space: nowrap;
  padding: 6px 18px; border-radius: var(--radius-pill);
  font-size: .875rem; font-weight: 500; color: var(--text);
  border: 1px solid transparent;
  transition: all .2s ease-out;
}
.nav-pill:hover { color: var(--title); background: rgba(255, 255, 255, .06); }
.nav-pill.active { color: var(--accent); background: rgba(34, 224, 198, .1); border-color: rgba(34, 224, 198, .25); }

/* Page Hero */
.page-hero {
  position: relative;
  min-height: 40vh; display: flex; align-items: center;
  background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  padding: 80px 0 60px;
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(7, 11, 20, .72), rgba(7, 11, 20, .92));
}
.page-hero .container { position: relative; z-index: 1; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: .8125rem; color: var(--text-dim); margin-bottom: 20px; }
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--text-dim); opacity: .6; }
.breadcrumb .current { color: var(--text); }
.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700; color: var(--title); line-height: 1.25;
  letter-spacing: .01em; margin-bottom: 16px;
}
.page-hero h1 .brand-divider { color: var(--accent); margin: 0 6px; font-weight: 400; }
.page-hero .hero-slogan {
  font-size: 1.0625rem; color: var(--text);
  max-width: 680px; line-height: 1.6;
}

/* Anchor Nav */
.anchor-nav {
  position: sticky; top: 112px; z-index: 50;
  background: rgba(13, 19, 34, .9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  overflow-x: auto; scrollbar-width: none;
}
.anchor-nav::-webkit-scrollbar { display: none; }
.anchor-nav .container {
  display: flex; gap: 8px; padding-top: 10px; padding-bottom: 10px;
}
.anchor-nav a {
  display: inline-block; white-space: nowrap;
  padding: 6px 18px; border-radius: var(--radius-pill);
  font-size: .875rem; font-weight: 500; color: var(--text);
  border: 1px solid transparent; transition: all .2s ease-out;
}
.anchor-nav a:hover { color: var(--title); background: rgba(255, 255, 255, .06); }
.anchor-nav a:active { color: var(--accent); }
.anchor-nav a.active { color: var(--accent); background: rgba(34, 224, 198, .1); border-color: rgba(34, 224, 198, .25); }

/* Metrics */
.metrics { background: var(--bg); }
.metrics-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.metric-card {
  background: rgba(14, 20, 36, .6);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 32px 24px; text-align: center; position: relative; overflow: hidden;
}
.metric-card::before {
  content: ''; position: absolute; top: 0; left: 20%; right: 20%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.metric-number {
  font-family: var(--mono); font-size: clamp(1.875rem, 3.5vw, 2.5rem);
  font-weight: 700; color: var(--title); line-height: 1.2;
  display: block; margin-bottom: 6px;
}
.metric-number em { font-style: normal; color: var(--accent); }
.metric-label { font-size: .875rem; color: var(--text-dim); }

/* Cases */
.cases { background: var(--bg-alt); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 700; color: var(--title); line-height: 1.3; }
.section-head p { color: var(--text-dim); font-size: .9375rem; max-width: 420px; text-align: right; }
.section-head .head-link { color: var(--accent); font-size: .875rem; white-space: nowrap; }
.section-head .head-link:hover { text-decoration: underline; }
.case-rows { display: flex; flex-direction: column; gap: 48px; }
.case-row {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center;
  background: rgba(14, 20, 36, .45);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 32px; overflow: hidden;
  transition: border-color .25s ease-out, box-shadow .25s ease-out, transform .25s ease-out;
}
.case-row:hover { border-color: rgba(34, 224, 198, .3); box-shadow: var(--shadow); transform: translateY(-2px); }
.case-row:nth-child(even) .case-img { order: 2; }
.case-row:nth-child(even) .case-info { order: 1; }
.case-img { position: relative; border-radius: var(--radius-md); overflow: hidden; aspect-ratio: 16 / 10; }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease-out; }
.case-row:hover .case-img img { transform: scale(1.03); }
.case-tag {
  position: absolute; top: 14px; left: 14px;
  background: rgba(7, 11, 20, .78); backdrop-filter: blur(6px);
  color: var(--accent); font-size: .75rem; font-weight: 600;
  padding: 4px 12px; border-radius: var(--radius-pill);
  border: 1px solid rgba(34, 224, 198, .25);
}
.case-info h3 { font-size: 1.375rem; font-weight: 700; color: var(--title); margin-bottom: 10px; }
.case-info p { font-size: .9375rem; color: var(--text); line-height: 1.75; margin-bottom: 18px; }
.case-stats { display: flex; gap: 24px; flex-wrap: wrap; }
.case-stat { font-size: .8125rem; color: var(--text-dim); }
.case-stat strong { display: block; font-family: var(--mono); font-size: 1.25rem; font-weight: 700; color: var(--title); }

/* Solutions */
.solutions { background: rgba(7, 11, 20, .8); position: relative; }
.solutions::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse at 20% 80%, rgba(79, 124, 255, .08), transparent 55%);
}
.solution-list { display: flex; flex-direction: column; gap: 24px; position: relative; z-index: 1; }
.solution-item {
  display: grid; grid-template-columns: 100px 1fr; gap: 8px 32px;
  background: rgba(14, 20, 36, .5);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 32px; transition: border-color .2s ease-out, background .2s ease-out;
}
.solution-item:hover { border-color: rgba(34, 224, 198, .28); background: rgba(14, 20, 36, .7); }
.solution-index {
  font-family: var(--mono); font-size: .9375rem; font-weight: 700; color: var(--accent);
  line-height: 1.6;
}
.solution-body h3 { font-size: 1.25rem; font-weight: 700; color: var(--title); margin-bottom: 8px; }
.solution-body p { font-size: .9375rem; color: var(--text); margin-bottom: 12px; }
.solution-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.solution-meta span {
  font-size: .75rem; color: var(--text-dim);
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--border); border-radius: var(--radius-pill);
  padding: 4px 12px;
}

/* FAQ */
.faq { background: var(--bg-alt); }
.faq-layout { display: grid; grid-template-columns: 380px 1fr; gap: 56px; align-items: start; }
.faq-intro h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); font-weight: 700; color: var(--title); margin-bottom: 16px; }
.faq-intro p { color: var(--text-dim); font-size: .9375rem; line-height: 1.8; margin-bottom: 24px; }
.faq-intro .intr-link { color: var(--accent); font-size: .875rem; border-bottom: 1px solid rgba(34, 224, 198, .3); padding-bottom: 2px; }
.faq-intro .intr-link:hover { border-color: var(--accent); }
.faq-list { border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-question {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 0; text-align: left; cursor: pointer;
}
.faq-question span { font-size: 1rem; font-weight: 600; color: var(--title); transition: color .2s ease-out; }
.faq-question:hover span { color: var(--accent); }
.faq-icon { position: relative; width: 20px; height: 20px; flex-shrink: 0; }
.faq-icon::before,
.faq-icon::after {
  content: ''; position: absolute; background: var(--text-dim);
  transition: all .25s ease-out;
}
.faq-icon::before { top: 9px; left: 0; width: 20px; height: 2px; }
.faq-icon::after { top: 0; left: 9px; width: 2px; height: 20px; }
.faq-item.open .faq-icon::after { transform: scaleY(0); }
.faq-item.open .faq-icon::before { background: var(--accent); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height .3s ease-out;
}
.faq-answer p { padding: 0 0 18px; color: var(--text); font-size: .9375rem; line-height: 1.8; }
.faq-item.open .faq-question span { color: var(--accent); }

/* CTA */
.cta-section {
  position: relative; padding: clamp(64px, 8vw, 100px) 0;
  background-color: var(--bg);
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover; background-position: center;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(7, 11, 20, .94) 40%, rgba(7, 11, 20, .78));
}
.cta-section::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, .03) 1px, transparent 1px);
  background-size: 22px 22px;
}
.cta-panel { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.cta-copy h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); font-weight: 700; color: var(--title); margin-bottom: 16px; }
.cta-copy p { color: var(--text); font-size: 1rem; line-height: 1.8; max-width: 460px; }
.cta-form-card {
  background: rgba(14, 20, 36, .6);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 32px; backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}
.cta-form-card h3 { font-size: 1.25rem; font-weight: 700; color: var(--title); margin-bottom: 20px; }
.cta-form-card form { display: flex; flex-direction: column; gap: 16px; }
.cta-form-card input,
.cta-form-card textarea { width: 100%; }
.cta-form-card textarea { min-height: 100px; resize: vertical; }
.form-note { font-size: .8125rem; color: var(--text-dim); text-align: center; }
.form-status {
  display: none; text-align: center; font-size: .875rem;
  padding: 10px 16px; border-radius: var(--radius-md);
  margin-top: 4px;
}
.form-status.success { background: rgba(34, 224, 198, .1); color: var(--accent); border: 1px solid rgba(34, 224, 198, .25); display: block; }
.form-status.fail { background: rgba(245, 184, 93, .1); color: var(--warning); border: 1px solid rgba(245, 184, 93, .25); display: block; }

/* Footer */
.site-footer { background: #05080F; border-top: 1px solid var(--border); padding: 64px 0 0; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid var(--border); }
.footer-brand p { color: var(--text-dim); font-size: .875rem; line-height: 1.75; margin-top: 16px; max-width: 340px; }
.footer-cols { display: flex; gap: 48px; }
.footer-col h4 { font-size: .9375rem; font-weight: 600; color: var(--title); margin-bottom: 16px; }
.footer-col a { display: block; color: var(--text-dim); font-size: .875rem; padding: 4px 0; transition: color .2s ease-out; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { display: flex; align-items: center; gap: 10px; padding: 24px 0 32px; font-size: .8125rem; color: var(--text-dim); }
.footer-bottom span { white-space: nowrap; }

/* Back Top */
.back-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 99;
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(14, 20, 36, .85); border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center;
  color: var(--text); font-size: 1.25rem; line-height: 1;
  opacity: 0; pointer-events: none; transform: translateY(10px);
  transition: all .25s ease-out;
}
.back-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-top:hover { color: var(--accent); border-color: rgba(34, 224, 198, .4); }
.back-top::before { content: '↑'; font-size: 1.125rem; }

/* Responsive */
@media (max-width: 1024px) {
  .header-top { padding-left: 16px; padding-right: 16px; }
  .header-nav { padding-left: 16px; padding-right: 16px; }
  .header-search { max-width: 320px; }
  .case-row { grid-template-columns: 1fr; padding: 24px; }
  .case-row:nth-child(even) .case-img { order: 0; }
  .case-row:nth-child(even) .case-info { order: 0; }
  .solution-item { grid-template-columns: 70px 1fr; padding: 24px; }
  .faq-layout { grid-template-columns: 1fr; gap: 32px; }
  .cta-panel { grid-template-columns: 1fr; gap: 32px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .header-search { display: none; }
  .header-cta .btn-primary { padding: 7px 16px; font-size: .8125rem; }
  .header-top { height: 56px; padding: 8px 16px; }
  .header-nav { padding-top: 4px; padding-bottom: 4px; }
  .anchor-nav { top: 100px; }
  .section { padding: 48px 0; }
  .page-hero { min-height: 36vh; padding: 60px 0 40px; }
  .page-hero h1 { font-size: 1.85rem; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .metric-card { padding: 24px 16px; }
  .case-row { padding: 20px; gap: 24px; }
  .case-info h3 { font-size: 1.125rem; }
  .solution-item { display: block; padding: 20px; }
  .solution-index { margin-bottom: 8px; }
  .cta-form-card { padding: 24px; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-cols { flex-wrap: wrap; gap: 24px; }
  .back-top { right: 16px; bottom: 16px; width: 40px; height: 40px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 8px; margin-bottom: 32px; }
  .section-head p { text-align: left; }
}
@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .brand-name { font-size: .9375rem; }
  .brand-logo { width: 30px; height: 30px; }
  .metrics-grid { grid-template-columns: 1fr; }
  .case-stats { gap: 16px; }
  .page-hero h1 { font-size: 1.625rem; }
  .page-hero .hero-slogan { font-size: .9375rem; }
  .header-nav .nav-pill { padding: 6px 14px; font-size: .8125rem; }
  .btn-primary, .btn-ghost { padding: 9px 18px; font-size: .875rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}